Permutation padlock



(ModeL) J. E. DEAN.

PERMUTATION PADLOGK.

No. 254,284. Patented'Peb. 28,1882.

ATTORNEYS.

UNITED STATES PATENT OFFICE.

JAMES E. DEAN, OF FISHKILIJ, NEW YORK.

PERMUTATlON-PADLOCK.

SPECIFICATION forming part of Letters Patent No. 254,284, dated February 28, 1882.

' Application filed April 25, 1881.

- a full, clear, and exact description.

The object of this invention is to provide a cheap and simple lock that may be used in' place of a padlock, and at the same time be more secure against attempts to pick it.

The invention consists essentially of a bolt having a polygonal or cylindrical head numbered or lettered on its faces, and having about its endeommunicatin g or intersecting annular and longitudinal grooves 5 and it further consists, in combination with the bolt, of polygonal or cylindrical ring-sections numbered 0r lettered on their faces, and provided with internally-projecting studs corresponding with the grooves in the bolt, said ring-sections being rotary, coupled together face to face by flaring rings or other connecting devices, as will be hereinafter described, so that they can move on each other, the design being to lock and unlock the look by arranging the ring-sections relatively to each other and to the bolt-head according to keys formed by combinations of the letters or figures.

Figure 1 is a front elevation of the lock-applied to a hasp and staple. Fig. 2 is a vertical sectional elevation of the same on line a: 00, Fig. 1. Fig. 3 is a plan of the same. Fig. 4 is a cross-section of the same on line y y, Fig.2.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents the bolt, provided with a polygonal head, B, whose faces are numbered from 0 to 9, inclusive, as shown. At its end said bolt has formed in it annular grooves a a and communicating longitudinal grooves 12 b.

C G 0 represent three blocks or ring-sections, provided internally with 'studs 0, that are designed to enter the grooves a b. In annular grooves in each face of the central section or block 0 is rigidly secured, by soldering or otherwise, a metal ring, D, with a rim, f,,

projecting beyond the nut-face, and in a face of each of the outer sections 0 O are formed (ModeL) annular undercut grooves g g, for the reception of the rims f of the rings D. These rimsfbein g entered into their corresponding grooves, g, the sections 0 G are rotated with pressure until said rims f are spread or flared; as shown in Fig. 2, into the undercut portions of the said grooves g 9, whereby said sections or blocks 0 O C, forming a sectional lock, are held closely together, and so that they may be rotated independently of each other. The lower nut blank or block 0 is closed at the bottom, as shown at h, to prevent the discovery of the combination and the picking of the look. If the said sections or blocks 0 O (J are rotated to a certain adjustment relatively to each other and to the bolt-head B, the lock may then be put ing the said lock until its studs 0 successively coincide with the grooves b, and at the same time pressing said lock upward on the said bolt A to lock the hasp F on the staple G, as shown, and the lock may be rotated bodily or in sections to make the look more proof against unauthorized attempts to unlock it.

The adjustment of the sections or blocks 0 G C relatively to the bolt-head B, by which it is possible to lock and unlock the device, is outwardly represented by the figures on said blocks and bolt-head, which furnish the key by which the locking and unlocking can be accomplished. In the present instance the lock is capable, in combination with the bolt-head B, of but one combination; but it is evident that by increasing the numbers of studs and vertical grooves in the device the number of combinations can be' increased to an almost unlimited extent. Itis manifest, too, that the studs 0 may be placed on the bolt A and the grooves a b formed in the lock, instead of being located as shown, without departing from my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a permutation-look, a bolt having a polygonal head with numbered faces, and annular as well as longitudinal grooves on its end, in combination with a locking device formed of connected independently-rotating numbered sections provided with studs corresponding with the grooves of the bolt, as set forth.

2. In the locking device of a permutationlock, the combination of several ringsections,

5 O, the central one having on each face a rigidly-secured ring, D, with projecting rim, and the others being provided with undercut grooves,

as shown and described, whereby said sections are held together so that they can rotate inde pendently of each other.

JAS. E. DEAN. Witnesses:

O. E. PELHAM, D. M. HORTON. 

